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` 2 SheetSShef l.' J. DEARBORN.

Semaphore.

No. 64,204. Patented April 30. 1867.

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J. DEARBDRN.r

Semaphore.

Patented April 3C,A 1867` Y r 1m W e v m,

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niteh tets'atnt @Hirn JONATHAN DEARBORN, OF SEABROOK, NEWHAMPSHIRE.

Letters Patent Efo. 64:,204, dated April 30, 1867.

IMPROVEMENT IN MECHANICAL 'I'ELEGEAPHS.

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TO AALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Beit known that I, JONATHAN DEARBORN, of Seabrook, in the county ofRockingham, and State of New Hampshire, have made a new and usefulinvention having reference to Telegraphie or Other Purposes; and I dohereby declare the same to be fullydescribed in the followingspecification, and represented in` the accompanying drawings, of whichiFigure Iis a top view.

Figure 2, a side elevation and Figure 3, a'vertical and longitudinalsection of it.

Figure 4 is a horizontal section, taken through its connection racks.

In such dra-wings, A andB are two horizontal shafts, each of which hasthree bell-cranks, a b c, each of which is arranged so as to stand at anangle of one hundred and twenty degrees with respect to that next to it.The cranks of one shaft. are connected with those of the other by meansof three rods de f, each of which embraces one of the cranks of oneshaft and one of the cranks of the other, the same being as representedin the drawings. One or more sprocket or lantern-wheels is fixed on eachof the shafts A B, and' concentrically therewith. Enfdless'chains D D goaround the wheels C C of the two shafts, and two other such wheels, E E,fixed on two other horizontal shafts, G Gr, arranged underneath theshafts A B. The link g of each of the said chains has atrapezoidal-shaped flange projecting inward from one edge of it, thesamebeing to enter between the cross-bars of the sprocket-wheel, and preventthe chain from slipping around on the wheel. Each link also hasv one ofa series of letters of the alphabet 'ixe'd'tb it, or to a block, 2',fixed to the link.

W'hen two endless chains are so made, viz, with letters o'r figures on.their links, each chain having its letters or iigures to correspond withthose of' the other, and the two chains have the same number oi' linksin each, and the shafts of the upper sprocket-wheels of the two chainsare provided with bell-cranks, connected by connecting-rods, as4described, the apparatus or machinery can be used for telegaphicpurposes.

The inode o'l connecting the two shafts of the upper sprocket-wheels,viz, by six bell-cranks and three connecting-rods, asdescrib'ed, enablesthe two shafts to be placed at a very great distance apart, and to berevolved synchronously whenever either of them is put in revolution bymanual power applied to it. Now, when one of these chains is revolved soas to bring either of its letters against a fixed niark, a like letterof the other chain may be brought, at the same time, against anotherxedwnark, whereby an' observer might, by observing the mark and letter,determine what letter his fellow-telegrapher may bring up to his ownixed mark. In this way a. system of telegraphic -signals may be madebetweenthe two, from one tothe other and back.

In order to transmit-rotary motion from one of the lower shafts of thechains, suoli shaft may have two bell-cranks m n on it. From thesecranks connecting-rods o o 'may proceed -to and be jointed to twoserrated racks H I, arranged over and on a sprooket-wheeh K,andconnected by a chain or band,'L, going around a pulley, M, the wholebeing as shown in the figures. While the shaft provided with the twocranks may be in revolution, a reciprocating movement will be impartedto the two racks, whereby they will be caused, by their action on thesprocket-wheel'K, to put such wheel in revolution in one direction, witha. continuous motion, such wheel being mounted on a shaft, S,

lVhat I claim as my invention in the above-described Amechanism is asfollows:

I claim the combination and arrangement of the six bellcranks and thethree connecting-rods with the two shafts, and also'with the twotelegraphic endless chains and their sprocket-wheels, applied together'and constructed substantially in manner andso as to operate asspecified. v

I also claim the combination and arrangement of the two serratedracks HI (connected by a chain going around a pulley, as described) with thesprocket-wheel K, the connecting-rods o o, and bell-cranks m n,

applied to a rotary shaft as set forth.

v JONATHAN DEARBORN.

Witnesses:

R. H. EDDY, F. P. HALE, Jr.

